Insulator



L. STEINBERGER INSULA TOR Original Filed Ja:1.'17, 1918 UNITED STATES PATENT OFFICE.

LGUIS STEIN'BERGER, OF BROOKLYN, NEW YORK.

INSULATOR.

Application filed January 3?, 1918, Serial 1V0. 212,341. Renewed June 11, 1923.

To (1 whom it may concern:

Be it known that 1, Louis STEINBERGER, a citizen of the United States, and a resident or" the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvemerits in Insulators, of which-the following is a specification.

This invention relates to insulators of the compression type and embodies a new construction by means of which theinsulator body and strain members may be quickly assembled and disassembled.

One or'f the objects of my invention is to provide an improved insulator having a body of insulating material which is entirely separate from but which may be readily connected to the respective strain members.

Another object of the invention is to provide an improved construction by means of which a new insulating body may be readily substituted for one whichhas become worn or broken in use.

Other objects will appear. from the subjoined specification and claims.

Referring to the, drawings: Fig. 1 is a side elevation of an insulator construction embodying my invention; v

Fig. 2 is a section on line 2-2 of Flg. 1. Fig. 3 is a plan view of the end of an insulator showing the construction and forma tion thereof. I

Fig.4 is a section partly broken away of a modified form of construction showing an insulating body with metallic re-enforcement on the end thereof.

Fig. 5 is a plan view of the metallic reeniorcement, a section of which is illustrated in Fig. 4:. 1

Fig. 6 is a sectional view on line 6-6 of the metallic re-enforcement shown in Fig. 5.

In the drawings in which like reference characters indicate like parts, 10 is an in-' sulating body, the side 10' of which is preferably provided with the formation shown which insures a longer surface for the travel of the electric current over the insulating body than would otherwise be the case should an insulating body having a smooth radially from said circular groove to the outer surface of the insulating body, these latter grooves being situated diametrically opposite to each other.

The groove formation as described and shown results in the formation of two outer walls. or ridges and 16 and an inner solid projection 17 on the ends of the insulating body. I Y

The strain members are so constructed that they may be interlocked one with the other and to this end one of the strain members 20 is integral andthe other strain member 21 is provided with two parts 22 and 23, the free ends of each of the leg portions of each of these parts having screw threads 24;

and 25 formed thereon and are secured to each other by nuts 26 and 26? as shown.

Bridge portions 30 and 31 connect the leg portions 32, 33 and 34, 35 of the strain members, the bridge portions consisting of rings 36 and 37 and radial projections 36, 36 and 37, 37 extending opposite to each other, which projections offset: the legs from the rings.

The rings and the offset projections of the bridge pieces are so shaped as to fit closely in the circular groove and radial grooves provided in the ends ofthe insulators when as shown in Fig. 4.. The metal plate is provided on its outer surface with a circular groove 51 and V with radially extending grooves 52 and 53 as shown, and they are of such shape and dimensions as to readily fit the ring and offset projections of the strain members.

The insulator is assembled by first interlocking the strain members as shown and then connecting the legs of the two part strain member together by means of the nuts.

An insulating body of any preferred shape which is provided with grooved ends as shown and described is then fitted between the bridge portions of the strain members, the rings and oiiset projections of the bridge portions of the strain members fitting into the circular groove, and the radial grooves respectively in the ends of the insulator. Such an insulator is very efficient and may be readily mounted and dismounted and also a new insulator body may be substituted for a broken insulator body Without having to remove the entire insulator. The duplication of parts in the manufacture thereof results in much convenience and in much saving of cost of manufacture.

The neck portion 60 of the body part which is to receive the metal reenforcing plate may be made angular in horizontal cross section so as to prevent the metal-reenforcement from twisting out of position.

The insulating member may be of any suitable material such as porcelain or glass, but I prefer to use the material known in the art as electrose, and the remaining parts are formed of any suitable metal or alloys thereof.

As changes of construction "could be made within the scope of my invention, it is intended that all matter contained in the above description or shown in the accompanying and not in a limiting sense.

Having now described my invention what i I claim as new and desire to secure by Letters Patent is:

1. In a device of the kind described, an insulator body provided with ring shaped grooves in the opposite faces thereof and radial grooves in the surface of the insulator projecting from said ring-shaped grooves.

2. In a device of the kind described a body of insulating material having ringshaped grooves in the opposite faces thereof, and grooves extending radially therefrom, the radial grooves in one face being substantially at right angles to the radial grooves in the other face.

In witness whereof, I have hereunto set my hand at the borough of Manhattan, city and State of New York, this fifteenth day of January, 1918. I

LOUIS STEINBERGER.

In presence of a C. G. BILLINGS, ZITA M. GRAHAM. 

